sierpinski.py

from graphics import *

def sierpinskiT(points,level,win):
    colormap = ['blue','red','green','white','yellow','violet','orange']
    p = Polygon(points)
    p.setFill(colormap[level])
    p.draw(win)

    if level > 0:
        sierpinskiT([points[0],getMid(points[0],points[1]),getMid(points[0],points[2])],level-1,win)
        sierpinskiT([points[1],getMid(points[0],points[1]),getMid(points[1],points[2])],level-1,win)
        sierpinskiT([points[2],getMid(points[2],points[1]),getMid(points[0],points[2])],level-1,win)

def getMid(p1,p2):
    return Point( ((p1.getX()+p2.getX()) / 2.0), ((p1.getY()+p2.getY()) / 2.0))

if __name__ == '__main__':
    win = GraphWin('st',500,500)
    win.setCoords(20,-10,80,50)
    myPoints = [Point(25,0),Point(50,43.3),Point(75,0)]
    sierpinskiT(myPoints,6,win)
    win.getMouse()
    win.close()